undet. Ostreidae

Geological context: Late Cretaceous, Fox Hills Fm, Timber Lake Mbr. Collection locality: concs., float on flats along NW-SE-trending road, .5 mi NW of Eagle Butte, and 1.8 mi SSE of Eagle Butte village, Ziebach County, South Dakota, USA. Collected by Karl M. Waage, David E. Schindel, Neil H. Landman, Danita Brandt, 1983. IP number 337868; lot count 1; original nature=chip/slab (multi-specimen); taphonomy=concretion; accn=IPA.07048; associatedwith=on same slab: IP.337851,on same slab: IP.337852,on same slab: IP.337853,on same slab: IP.337854,on same slab: IP.337855,on same slab: IP.337856,on same slab: IP.337857,on same slab: IP.337858,on same slab: IP.337859,on same slab: IP.337860,on same slab: IP.337861,on same slab: IP.337862,on same slab: IP.337863,on same slab: IP.337864,on same slab: IP.337865,on same slab: IP.337866,on same slab: IP.337867,on same slab: IP.337868,on same slab: IP.337869,on same slab: IP.337870,on same slab: IP.337871.